Catherine McCormack, Stacy Keach land roles in drama

"Lights Out," from Fox TV Studios and FX Prods., centers on Patrick "Lights" Leary (McCallany), an aging former heavyweight boxing champion who struggles to support his wife (McCormack), a pediatric orthopedic surgeon, and three daughters after his fighting days are over.

Diagnosed with a neurological disorder called pugilistic dementia, he takes a job as a legbreaker, collecting on unpaid gambling debts.

Keach will play Leary's father and former trainer, a widower who still runs a gym.

Warren Leight serves as showrunner on "Lights," which was created by Justin Zackham. The two are executive producing with Phillip Noyce and Ross Fineman.

"Lights" was picked up to series in September, after Light was brought in to tweak the original pilot, directed by Clark Johnson, and pen two more scripts with Zackham.

As part of the revamp, most of the other key roles -- except for Leary -- were recast.

McCormack replaces Melora Hardin, who played the wife in the pilot, while Keach takes over for Kevin Conway.

British actress McCormack most recently starred in "28 Weeks Later."

Veteran Keach recently played a boxing trainer in the indie pic "The Boxer."